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| All Patents in class 307/78 | |||||
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| Number | Date | Patentee | Title | Type | |
| 248,435 | Oct. 18, 1881 | T.A. Edison | Utilizing Electricity as Motive Power | DC motors | |
| 294,095 | Feb. 26, 1884 | E. Thomson | Electric Power Distribution System | electric distribution systems | |